This should honestly not be allowed.. I would like to see pets removed from PVP as it is actually effecting the gameplay. We sat there for about 5 minutes until I went inside the pets itself and killed him, but it blocks the arrows from hitting the player and people are using them as shields in Archer.
I've said this many times before. Noobcrew is working on getting all pets removed from the servers that are only pvp. Such as kit pvp, op pvp, archer pvp, infection, and skywars.
Support. In every pvp mode, there are people hiding in pets to just get away from a fight and run to spawn.