u/60llum

There’s a stray puppy around 4.5 months old. For the last two days, he has been aggressively attacking his sister, who is the same age as him. Earlier, he used to be very chill with everything, but his behaviour has suddenly changed drastically. When I tried to pet him, he snapped at me too, which he had never done before.

I have a Golden Retriever and an Indie dog at home. Earlier, the puppy used to be scared of my Golden because of his size, but now he suddenly seems completely fearless and aggressive. As far as I know, no other dog has bitten or attacked him recently, so I’m unable to understand what could be causing this sudden change in behaviour.

Pic was taken around 10 days ago.