Ok, Berdi is 20 years old and a couple of years ago had an injury on a cattle feeder. Ever since she has had a bump on her knee. The people that had her before said she was sound on it and when I got her she was fine. Just recently however her knee has swollen. There is no heat and she doesn't flinch when I touch it or put pressure on it. She is a little reluctant to pick up her front feet and has not wanted to canter at all. I thought she has some arthritis and have started her on a joint supplement. However last night I took her for a short ride and she seemed off at the trot and even a little at the walk. However it seems like a stiffness - not actual lameness if that makes any sense.
So I need help! If it is arthritis than I'm going to get a better joint supplement - maybe even injections. I also read that mildly arthritic horses should be kept lightly ridden. Does this sound like arthritis to you or something else? She is overweight too - so I wonder if that would affect the arthritis if that is what it is. I have to get her muzzle back on. She had it off for a while since it was rubbing her.
And advice would be much appreciated!