When I put water in their dish theyact like they are bobbing for apples
I give them icecubes all the time though. Tank carries his to the couch and lays there and chews on it. He acts like it's a bone or something. Anyway, mine love them and they have never had any trouble with coughing or chocking kind of noises, or anything of the sort so I'm sure they are chewing them well. In fact when they hear me getting a glass of ice they both come and "sit nice" to get their cold treat.