She wasn't in pain when her knee was manipulated. When she had a partial tear, she would limp. When she sat she put that leg out straight, would sometimes go out in the yard and sit against the fence--which was weird.
When it became a full blown tear she would not use the leg at all. She would let me manipulate the leg etc with no reaction.
Not sure what to tell you about the depth of the pool. If you get the deeper one you are going to have to come up with some sort of ramp or steps to get your pooch in and out. My dogs can touch the ground if need be, but I hold them so they swim. They don't like the water.
PS. Regarding the knee ligament---it was explained to me as a fraying rope. The tears won't repair themselves, but scar tissue will form. When Lilly had the partial tear I knew it would eventually tear so I did not restrict her. Within a few weeks it went to a full tear and she had surgery.
I didn't bother with conservative management either time she tore her CCL. We went straight to surgery for both knees. She had an extracapsular traditional surgery each time.
I got a dog for my husband. It was a good trade.
LILLY and RUDY
In Memory of MADISON, The King 12/89-6/04
In Memory of JAKE, The Perfect Dog 9/01-11/02