Well I have knowledge of Wheelchairs... My Babybear has one, but he has had three all together and the best one I can tell you is through Eddie's wheels.. If you go to
http://eddieswheels.com/ Talk to Leslie she can point you in the right direction.. Let her know that Babybear sent you.. She will know who you are talking about.. Your baby will need a rear wheeled cart.. This company is great to work with..They really are.. I have delt with another wheelchair company and they charged way way to much for thier chairs and they are crap.. sorry I am being nice here.. If you go to Babybear's webpage at
http://www.dogster.com/dogs/136060 You will see Babybear in three different wheelchairs.. I made him the first one you see him in and the second one is made by the company I will not recommend and then there is the Eddie's wheels chair.. First time Babybear stood in that cart he walk for the first time in over a year alone.. If you would like more information please PM me and I will give you my email addy..
If you have any questions please do not hesitate to ask me..I would love to help you with your questions.. Can't stand to see a good pup down..You are a great mom for going through all this with your baby..