To think that this can be normal 13 month old behaviour

[WhiteFeatherHeather]

My son is so naughty and I'm at my wits end. I'm literally on the brink of tears writing this but I'm not sure what else I can do.
He's 13 months old I work part time and he is with my DM when I work and DH is at work. Both DM and DH thibk it's normal 13 month old behaviour but I honestly think he is really naughty and I'm not sure how you discipline a 13 month old.

He will hit and nip ALOT, laughs if I tell him off, does naughty things for me to tell him off like tip the dogs biscuits over (he does this 10+ times a day if I'm not quick enough) He bites grown ups and other children and he seems to get angry really quickly. He has a drink and literally throws his up across the room if he's finished.
He's really bright and energetic and I love him whole heartedly I just feel like I'm cracking up and I could scream. no matter what I do to entertain him he just seems to always misbehave.
What can I do?

To a child this age EVERYTHING is FUN, everything is a toy to be explored, just to see what happens when you do x,y and z...including adults, other children and pets. So yes, he will bite, pull, scratch, tip things, push / pull and also put things in 'odd' places.
The only thing you can do is stay calm and explain over and over and over, "no we don't do this/that" whilst removing the child from the situation and as quickly as possible finding something else to occupy them with - (my favourite was saucepan and wooden spoons) but simple things like 2 plastic cups, a washing up bowl and water or dry pasta paper and pva glue, etc this stage passes faster than you'd think, especially if the child receives a consistent response. Good luck 🍀

I remember when mine was two we went swimming with my friend and her son who was the same age. We were queuing to pay at the counter and when we turned round her son was standing there angelically holding his little swimming bag whilst my excitable son had hurled off all his clothes and nappy and was standing there naked with his bag tipped out and his clothes everywhere in the foyer of the sports centre.

@ Foxgloves

The infuriating thing is i know my dd could fit either description on any given day

There's no point in being embarrassed or smug - little buggers keep on chucking those curve balls left right and centre!

Sounds like he may be doing it for attention. Young youngest also wouldn't be told no. I just ignored him and he quickly stopped doing the things that I didn't like.

My son is 16 months old and behaves very similarly so I understand completely. A close relative has a behavioural disorder and I'm constantly worried my son will be the same.

But, I do think it's pretty standard behaviour. I don't think it's naughty as there is not malicious intent behind it - they're learning how things work! I firmly tell him no. I remove him from situations. I take things away. Things are getting easier in some ways now.

My DM lets DC get away with everything, which doesn't help. If your DM is the same, try asking her to support you by following your lead and things will improve.