Cat bites, goat headbutts. They play in their own way.
This little video shows how each animal species have their own way to engage in play. This tiny, baby goat only knows how to headbutt if he wants to have fun with his cat companion while she employs typical cat play behaviour; the friendly, fun bite that can be too strong sometimes.

Goat and cat play in their own way. Screenshot.
It is a bit of a shame that the domestic cat has weapons to play with! The jaw is strong and the teeth quite sharp. The claws are damned sharp and both teeth and claws are used in play. The goat’s headbutt is far less painful when the goat is this size!
Baby Goat tries to headbutt Cat pic.twitter.com/xWuuUdaRBb
— Aww Club (@awwcutenesss) December 10, 2019
There are a few things about the domestic cat which get in the way of a friendly interspecies relationship. Both the goat and cat use weapons to play with. It is a bit odd that play has to have an underlying aggressivity. It does because at its core cat play is practicing hunting. And goat head butting is both a way to play and outside of play the headbutt is for fending off threats.
Both for the goat and cat, play is linked to real life aggressiveness for serious reasons.

Rooster play-fights with domestic cat
Read More

Dog strokes cat who reciprocates the affection (video)
Read More

Cows love ginger cat and lick him extravagantly
Read More

Cute blue kitten and beige hamster
Read More

Unimaginable friendship between black cat and black snake
Read More

Ducklings suckling a cat (video)
Read More

Dog puts arm around the cat he loves (video)
Read More

Picture of a cat protecting a little monkey from a large dog
Read More