We have a 2 year old (recently) gelded male. He is in the pasture with a jenny and her foal (another jenny). We had him first and moved the jenny in a few weeks later, she foaled the very first day after she arrived. So the dynamic has always been the 3 of them. They have been getting along fine, the mom had been very protective and food aggressive, but otherwise there haven't been any problems. I've even seen the male playing with the baby, running and chasing, baby would even buck her head and antagonize him. However recently, I have watched him grab her or bite her by the neck and hold on while she's trying to get away. I'm not sure if he thinks he is playing, but it looks like he's being too rough. They will go around in the circles for several seconds until he finally let's her loose. The mom has not recently been following as close to prevent these incidents. Is this typical/playful behavior or should I be concerned for the little one?