well, i read thru this thread...and i don't comment much. and im not sure if the dismissive attitude ceased at some point...and i dont want to sound insensitive...but i don't know the extent of your injuries, but if you were sick, would you not find a way to get to the drs because you are disabled? would you lay there and die? i think not. i mean this in a very good way. disability, does not mean no ability. and the ability is not there, then maybe you should be more inviting to people who are trying to help and work on finding out how, instead of saying can't and trying to find holes in everything. at some point you have to find people to put your trust in, how you decide that, is up to you... do you have friends who will partner up with you? someone in your area that will volunteer to help? if you've had these chins for years, certainly you could've saved 50 cent a day to put into a vet fund. a check up here is 57 bucks.
as far as solutions. are you cleaning their cage? how often? washing their water bottle? why type of water are you giving them? do they have hay at all times? are you still feeding them treats? that same food? how do your chins eyes look? are any of them tilting their heads or anything?
i don't want to sound harsh, but i also don't want you to give up on yourself, bc those little guys need you.
oh and i don't know if you accepted that the chins don't need treats, but if i ate what made me go ga-ga, twice a day, i would probably shorten my life. imagine the life you take away from something with a lifespan 1/3 of yours...