my 10 yr Boston seems to really this, because all of sudden she has become quite picky.
The liquid is very thick and does not pour easily. It needs to be put into something else and heated up to thin it out. My first bottle was fine, but reorders are almost too thick to use. Don't make a mistake and put this bottle in a microwave to thin it out. I found out the hard way it is not made for a microwave and got very distorted.