I took the boys to the vet for their last shots yesterday. We are concerned about our 17 week 7+ lb. (3.3kg) kitten, Buzz. He is really a klutz especially compared to his agile brother. More worrisome is the way he walks - a little cow hocked with a swagger, his poor jumping ability and his sometimes out of control landings. He doesn't always have these symptoms and will hop up the tree behind Baxter without trouble. I am praying he is just a big clumsy guy but our vet is going to have him tested genetically. I contacted our breeder to make sure she screens for SMA. She doesn't but said she has never had it in her lines. She didn't say whether or not the parents had produced offspring together though. So until we know what we are dealing with -or not- is there anyone here who has a MC with SMA? I am so worried - he is the sweetest most laid back guy ever. Thanks for any info and/or encouragement!