Oh that is sad, poor chap missing his sister. When we had dogs, they didn't really notice the loss of another because they had come from rescues at different times, so didn't feel that tie that siblings would.
I know what your saying VW and I have been adamant, no more as I was hoping that we could travel more - ha that's a joke I know, but when you have more than one dog it isn't so easy to get someone to look after them and it certainly is less work with just one. Ruben doesn't moult to the degree Roxy did. However, it is only a month so may see me relenting. He has taken to a new toy one of the kids bought him a panda head on a plaited rope.
My friend has a female retriever, so I was hoping that we could meet up and go for a walk, but will have to wait for the weather to improve and some form of relaxation of rules as she lives too far away not to drive.