My 1 year old dog is half German Shepherd, half lab. He loves swimming himself, but today was the first time we had him out in the backyard while we had people over to go swimming in our inground pool. He was freaking out and barking/trying to jump in the water with the people swimming. We think he is doing this because he believes that they are in trouble. We have a vinyl liner in the pool so just letting him swim is not an option we are thinking of for an answer. Today we put him inside in the crate because he did not stop barking. However, since the summer is just beginning, we would like to have him outside enjoying the weather with us. Any suggestions on how to fix this would be great! Thanks!!