what can be causing my kitten to not walk on back legs?

[critters]

yes i think that was one of the hardest parts to deal with but the most was "He trusted me and I let him down, I didn't do everything I should have or he would still be here"

Not necessarily. We can't fix everything, you know. Sometimes there's just too much wrong for them to recover, especially little ones.

[Georgiesmomma]

Its been 3 months now and everyone keeps telling me things like that but I know I should have taken him to the vet when he had that cold I just didn’t have the money and I did everything to help him with what I had and he did get better but I should have known to still take him to the vet I am almost positive he died from a lingering infection…Ill never be able to not feel like I let him down

[ppaws45]

I know that you do everything the you could....
Don't be sad..I know it was very hard to deal with