1 year old boy acting up..being a bully in daycare?

He is a baby. This is what babies / toddlers do. Reward positive behavior, redirect bad behavior to something appropriate. Day care centers can bring out aggression in infants and toddlers, all trying to fight for limited attention. Add that toddlers have poor vocabulary, the best way to 'speak out' is being the most noticeable in class.

At a year he should be with an adult who loves him, not in an environment with other children where he doesn't have one-on-one attention. He's not a 'bully', he's just very young and will naturally push and pull things in his way. He doesn't yet understand that other people have feelings, particularly not other children who may get in his way.

When you say 'no', all he understands is that you don't want him doing something - but he won't know what. You have to teach him by gentle example, conversation, distraction and so on; it's why a child this age should be full-time with an adult who engages with him.

kids are like that. the day care should give him time out and explain that his actions are not acceptable. start telling him no at home when he wants something he shouldn't have instead of giving in to him

Let me guess - only child? Rules the house? Gets everything he wants? The only way to teach children not to things they are not supposed to do is to cause them to experience undesirable consequences for such behavior. CONSISTENTLY. There is a very good TV series about how to deal with children with issues such as this. It's called Super Nanny and she is excellent. Watch the show and learn from her.

Take him to a pediatrician. You need to find out the cause for this unusual behavior.

He's only one....Yes it's wrong to do, but he's only one....

Reward good behavior, distract bad behavior.