At the end of my tether with DD

[whyIsARavenLikeAWritingDesk]

My little girl is 22 months and we always the easiest happiest girl ever. Now she has probably hit the terrible 2's but I'm really struggling to cope with her behaviour. It's mainly with her 3.5 year old cousin and she hits, bites, pulls his hair, nips him.
Part of me is thinking it all stems from frustration as he is really bad at sharing his toys or anything for that matter and won't let her play with anything before snatching it from her. My issue is that it is starting to happen out of the blue, she'll just randomly do something to him. Last night she tried to bite the dog!!! Was put on time out but she just laughs when we do that!!
I suggested a sticker chart but DP thinks she's too young which is probably correct.
Please please please can someone help

Both of my kids went through a biting phase; never any other kids, but us and each other. It was rather short lived and a few dramatic 'owwws' and looking sad/crying seemed to stop it.

Sharing is really hard! Adults don't have to share stuff, so I always think it must be really hard for little kids to automatically do so. I try to get them working together - building towers etc - rather than just saying share/let soandso have a go.

He won't even let her help with towers I know he's only little aswell but he's never had anyone to share with so this must be really hard on him too.

She goes to a childminders and she's fantastic there with the other children, it's just her cousin. Her aunty has her when I work other than the childminder and she also has DCousin so they are always together, they go to grandparents house everyday and are confined to the front room with lots of dogs and people, it's not an ideal situation but I'm very grateful for DD being looked after. Could this be a contributor?

I was in tears last night as I honestly don't know what to do, we've tried calm, angry, time out, ignoring but it's been 3 months now.

Anyone else got any advice?

Please don't do time out. She's too young so won't understand what you are trying to do.

She is little and can't communicate her needs. Biting does this.

The situation at grand seems too much. She is probably overwhelmed.

Dogs need to be locked in another room.

Gran needs to be on the floor playing with them. Directing play. It's probably overwhelming for the cousin too.

Children react to situations. They do not premeditate at that age.

If you are not there when it happens there is nothing you can do.

At that age it's all about modelling behaviour, distraction and controlling the environment.

Turn taking games. Ben puts a brick on now milly puts a brick on. Rolling a ball back and forth between them. Kind hands. Ben has a turn playing. Now Ben now it's millys turn etc.

Think of the behaviour as an iceberg. The part you see out the water is the behaviour. Biting, snatching toy etc.
The reason or cause is the massive bit under the water. Overwhelmed. Can't communicate efficiently. Etc etc. Deal with the part you can't see and the behaviours will reduce.