We have 3 mo. old golden comments. Went out the other day (very hot for first time this year high 80's) and one was just laying there, didn't want to move and was letting others walk on her. Brought her in, gave water. Rust colored water started coming out of her mouth. Finally about 30 mins later she had a sesiesure (sp) and died. All others are doing fine except we do have one that just isn't moving quit as fast as normal. So I don't know if it was the heat or if there is something else going on. Any help would be great.