An important part of rear end paralysis care involves diet. You need to be aware that a disabled bunny's eating habits may change, especially as they grow older. Generally speaking, a rabbit's diet should be high in fiber and low in sugars, which means about 80% of the diet should be hay, 15% should be fresh vegetables and 5% should be pellets and treats.
In my experience, however, older rabbits tend to become less interested in hay (also less interested in using the litter box). Even if they were good hay eaters in the past, I wouldn't see them eating as much hay after they reached the age of 11 years or older. This was especially true if they had health issues.
There are a number of reasons why rabbits may lose weight. It's important to realize that slowing down or reversing weight loss cannot always be solved with just offering more food. The underlying problem needs to be addressed first. Weight loss can result from the following:
Since there may be several reasons for weight loss, it is important to speak to your vet first to make sure your bunny receives the necessary care.
Rear end paralysis bunnies are usually dealing with pain from their condition. Whether the cause is from arthritis, spondylosis, E. cuniculi, spinal compression or fracture, adequate pain management is a priority. Your vet may prescribe meloxicam (brand name Metacam®), which is a NSAID (like ibuprofen for humans). Metacam is great for reducing inflammation caused by arthritis and dulling pain in joints. Another helpful medication is gabapentin, which is used to eliminate nerve pain, which is typical in spinal compressions and spondylosis. The medication can cause drowsiness, so make sure your bunny still eats when on this medication. For moderate to severe pain, opioids such as Tramadol, butorphanol and buprenorphine may also be prescribed, especially if Metacam is not advised due to kidney issues. Opioids can also cause your bunny to sleep more than usual. Adequan is an injectable drug that eases arthritis pain and stimulates joint cartilage repair. This medication can also be helpful for your bunny.
Your vet may start out with Metacam and either change dosing or add medications based on your bunny's level of pain and other health issues.
Other methods to reduce pain may include physical and massage therapy. Your vet may suggest using a heating pad (or a cold pack) on your bunny's back. Cold laser therapy and acupuncture can also be beneficial, although it may be difficult for you to tell how helpful it really is by just observing your bunny afterwards. Another drug-free alternative is using an Assisi Loop, which uses Targeted Pulsed Electromagnetic Field technology to alleviate pain, ease muscle spasms and reduce inflammation. I have used an Assisi Loop myself and have found it to be helpful.
Joint supplements may or may not be helpful. Typically, the effectiveness in supplements is hard to judge once your bunny is completely immobile. Owners may see more positive results if their bunnies are at the stage where they need more assistance in moving around or getting into their litter boxes. Many rabbits respond well to Myristol, which is an excellent joint supplement that has a rabbit-specific formula.
Another part of pain management involves setting up the bunny's pen with his comfort in mind. More details on creating the best possible space for your disabled bun can be found in Rear End Paralysis Care: Setting up the Pen and Socialization.
Bunnies with rear end paralysis will experience a degree of muscle loss due to inactivity. You can slow down the atrophy with physical therapy exercises, but there still will be some loss over time. The more inactive your bunny is, the greater you'll notice a drop in weight.
When your bunny first becomes immobile (and especially if he is a senior), you may notice that his weight drops quickly, seemingly like a free fall. His weight will need to be stabilized quickly.
First, make sure your bunny can access his food and water. Can your bunny reach the hay? Do you need a low entry litter box or place the hay on the floor? Is the water bowl too deep to drink from, or does he need a water bottle? Your observations will determine what needs to be changed in your bunny's pen.
Even if you do not see your bunny eat hay, make sure he always has access to quality grass hay. To add more interest, offer a variety of different hays. Many rabbits enjoy oat hay (or a blended mix with oat hay included), because of the seed heads. You can sprinkle in dried flowers or herbs, or even some alfalfa hay. Be aware that if your bunny has bladder sludge or any other health issues effecting the kidneys, alfalfa is not a good idea.
Increasing the amount of pellets fed out may be necessary. You can either have a dish full of pellets out all day or feed out a handful several times a day (which may be better if your bunny lives with younger, healthier and more active rabbits).
A bunny losing weight with rear end paralysis can drop 1/3 of his weight within a month. Increasing the calories often means giving pellets, treats and other foods more frequently than you would with a normal adult bunny. This is fine, because you want to stabilize your bunny's weight. However, be sure to still provide plenty of hay, veggies and fresh water.
Be aware that sometimes seniors may lose interest in certain foods as their sense of smell and taste buds don't work as well as they did when they were younger. You may need to move away from lettuce and focus more on herbs as they have a stronger aroma. Cilantro, basil, oregano, thyme, dill, mint, parsley and rosemary are all good choices to peak a bunny's interest.
What you use for dishes is going to be very important, since your disabled rabbit will not be able to easily adjust himself to access the food better. Generally speaking, you will want a small bowl or plate in which the edges of the dish gradually slope out. This is to better accommodate the bunny as he is pushing the mush or oatmeal to the side of the dish and licking the food up. The base of the bowl can be slightly raised (approximately 1/2 inch). A raised base is good if your bunny spends a lot of time sitting up. You may still need to provide a suitable platform.
Some bunnies may spend a great deal of time on their side (or they may sit up at the beginning of the meal and slide down to their side). In this case you do want to use a plate.
This is a dog bowl, which I have used as a water bowl for some of my bunnies. However, the edge is 3" high which makes this totally unsuitable for a rear end paralysis bunny.
These are bowls commonly found in the small animal aisle at a pet store. They may work for a regular bunny, but not a disabled rabbit. The edges are about 1.5" inches, but not sloped. The bowl itself is not so wide where a bunny can angle his head in to reach his food better.
These are bowls which you might find in the cat aisle of a pet store. The edges are approximately 2" inches high but not sloped, which may be suitable for some disabled bunnies, but not all.
These are another two cat bowls. The black one is a base that comes with a glass insert (which I didn't buy). The edges of both bowls is about 1.5" high, but the dish is wide and shallow. This is why I like using cat dishes for disabled bunnies.
This is actually a homemade bowl I received from a friend. It was specifically made for a disabled bunny. The dish is about 1" high, the edges are sloped, the bowl is shallow and the base is slightly raised (not shown).
Sometimes you can use small bowls used for condiments. My favorite is Japanese soy sauce dishes typically used for sushi. You can get either a plate or bowl. They are perfect for a bunny who is on his side.
The larger plate in the back is good if you have two or more disabled bunnies.
Rabbits require 50-100ml/kg of body weight per day (Harcourt-Brown 2001), which is more than several other species in comparison. However, it can be difficult to determine if your bunny is dehydrated just by looking at the water bowl. A large portion of water is consumed through leafy vegetables. Still, fresh water should be available to a bunny at all times.
Providing access to water for rear end paralysis rabbits can be tricky. Quite often they may stumble into the bowl or tip it over. If it is a very deep bowl, they may have difficulty leaning over the edge. You definitely do not want your bunny getting into a situation in which they cannot rescue themselves from the water dish.
Water bottles can be very helpful in providing access to water. The most difficult aspect is positioning the bottle correctly, so it is neither too low or too high for a disabled bunny to reach.
If the horizontal bars on the exercise pen (as shown in the picture on the left) are spread out too far, you can get a piece of hardware cloth where the mesh opening is big enough to slide the spout of the water bottle through. Use zip ties to fasten the hardware cloth to the pen, and then position the water bottle at the right height.
Check the bottle often. Sometimes they leak, but sometimes so much vacuum pressure is built up that no water will come out. Water bottles can be a good solution, especially when it gets hot. You can put ice cubes in the bottle to keep the water cool longer.
If you have been giving water bowls, your bunny may not be familiar with the water bottle. Show him where it is and what it does. I will normally set the bottle up close to the bunny and touch the tip of the spout with my finger until some water comes out and then touch the bunny's nose. Usually, they will catch on right away. However, some bunnies just will not drink from a bottle and you need to hydrate them other ways.
If your vet determines that your bunny is dehydrated and would benefit from additional fluids being administered, you may be asked to give sub-q fluids at home. This means that you would be injecting fluids just under the skin in the shoulder area on the back. It is a simple procedure and it is a good way to make sure your bunny stays hydrated.
Lactated Ringer Solution (LRS) is a sterile solution composed of water, sodium chloride (salt), sodium lactate, potassium chloride and calcium chloride (Whitlock, 2020). In other words, it has electrolytes to help the body function normally. LRS is only available by prescription and your veterinarian or a member of the staff will show you how to properly administer the solution.
There are two different ways to administer fluids. The first is where you attach one end of the port to the bag of fluids, and on the other end of the port, you attach a needle which you insert into your bunny. The port itself controls the flow of fluid traveling from the bag into the bunny.
The other way is to draw up the amount of fluids you wish to inject first into the syringe, attach the butterfly needle and then inject the fluid into your bunny. The second method is more accurate and it is something I will do if I need to warm up the fluids first before injecting (usually applicable for a bunny in GI stasis with a low temperature). Most people have a preference based on what they are used to.
A rear end paralysis bunny will drop weight very quickly, but addressing the weight loss takes more than feeding your bunny more treats. Speak to your vet and make sure there isn't a medical reason for the weight loss (such as a dental issue) and talk about pain management.
There are several ways to increase daily calories. However, make sure your bunny still gets enough fiber in his diet. Greens will help make sure your bunny is hydrated, but you may still need to syringe-feed water or administer sub-q fluids.
In time, this will all become very routine. There may be some minor changes you need to make here and there, so definitely do not worry about getting everything correct the first time. Your bunny's needs will change over time, so just stay observant.
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Harcourt-Brown, Frances. 2002. Textbook of Rabbit Medicine. Oxford: Butterworth Heinemann 52
Mead, M., Brown, S., Chlebeček, T., Hutcheson, J. Overweight and Underweight Rabbits. House Rabbit Society 2013
Whitlock, J. What Is Lactated Ringer Solution? verywellhealth.com March 2020