hi, poor weee pop; sorry i don't know of those injections, but i thought this may be worth a try...
my 8yr old was diagnosed a fair few years back with lp in both back legs, (but surgery wasnt an option for him either) and it had started to affect him really badly, and he was hardly even walking about and arthritis had started to set in ... about 8-9months ago my vet had just been visited by a rep of some sort who left sample bags of a joint supplement called Magnacare (
Magnacare | Forum Animal Health | Small Animals | Animal Health Products) and it worked magic! he is running around playing with my puppy now- something he has Never done before, and when he was last in the vets, he said that the arthritis wouldn't be a problem for him for a few more years because of the difference in his knees.
so now all my kids get it on their food to help maintain good healthy joints; it might be worth asking your vet about it as well?
i don't buy it from my vets though, it was £46 for 500g (100 days worth) but only £27 on vetuk, but if you buy off vetuk via
Shop Online and Help TOLFA — Tree Of Life For Animals then vetuk will dontate on your behalf to the charity- '
Help us raise money for our animal shelter in India by clicking on a link below and for every purchase you make we will receive a donation - at no extra cost to you!'
i only found out about that link the other day, but thought i'd share in case you decide to give the magnacare a go!?!
i hope she is feeling better soon!