2yr.Old Hollang Lop Buck

Question
Hello,
My two year old Holland Lop buck was just given to me about a month ago from my friend and when we got him into his new cage we noticed that he would kind-of drag his rear-end. He would still drink but in his last couple of weeks he wasn't eating as much. He recently died but I would still like to have an idea of what this is and if it is hereditary since i was dumb enough to breed him to my female without knowing what was wrong. Well, to go into more detail:
   -He doesn't eat very much if at all
   -His legs aren't sprawled(maintain normal position)but don't get used much for walking(puts just enough pressure on them to hop but not to left his rear-end)
   - He does respond to touch
   -His legs and feet,I noticed, aren't as big as my female's legs and feet

Thank you for your time and I appreciate you taking your time to help everyone you can.

Answer
Hi There

I'm sorry to hear about your loss.
I can understand wanting to know what happened. I would want to understand too. You mentioned having bred him with your female rabbit. Has she had her kits yet? I have a few previous answers on families with new baby rabbits and what to do. Check it out, it never hurts to freshen up on some of this info.
Either his back was broken or sprained, or he had a parasite. Any bunny who drags his butt sounds like he has had a spinal injury. Rabbits can sometimes get these from jumping around their cages and hitting their back on the top of the cage. They are delicate little creatures and there`s one vertebrae that tends to break easily. Some rabbits have broken it simply by binkying (kicking their legs to the side in mid-air).
Like a few other people mentioned, it could be paralyzed in the rear end due to running around in the cage and then running into the side of the cage when it got scared.

E. cuniculi, which is a very common parasite which can affect the brain and kidneys and sometimes cause excessive drinking. Here is a link for info on this disease considering your female bunny and the kits have exposure risk. I would want to take the female to the vet while pregnant, or take the kits as well.

http://www.rabbit.org/journal/3-2/e-cuniculi.html

Good luck and I am so glad you decided to want to know what went on. Your proactive might save your pets life.