Dog drowns in pet store pool

[Catherine]

To me the dog looked like he was drowning right from the moment he went into the water. If I had been shopping in the store I would have wanted to jump in and pull him from the water.

I can understand you and Misty running to the aid of a dog in trouble. The woman did her part when she called for help. 
You all responded the way you should have. The woman must have been so happy to see you come running. You were like a guardian angel for the dog coming to the rescue just in time.

That was sweet of her to remember you and have you in for tea. You gave her back her dog when she thought all was lost.

I just can't understand how passive they all were. I soak my various reptiles in special plastic containers. I never make the water too deep. I never leave anyone too long. I still check frequently to make sure nothing goes wrong. I have never heard of a reptile in soak drowning, but I still worry a little. What I am doing is good for them, but I still exercise caution.

Why wouldn't they have been cautious when putting a dog in a pool for the first time?