So it's FIL's birthday soon and it's a big one. PIL are hosting a big party in their house for the family.
The only children in the family are ours and BIL's DS who will be 7 months at the time.
PIL have a dog that is IMO aggressive, despite what they think. I really like dogs and I'm fine with my dc being near them, living where we do they need to be relaxed around dogs...but not this particular dog. I've first hand witnessed him try to bite a child in a pub garden, with his hackles up. Was bloody awful and the poor child looked traumatised. Luckily dog couldn't reach the child so didn't actually touch the child. He's not trained and totally out of control, but he's a Labrador so apparently can't possibly be aggressive. 
Anyway we've been told we need to make alternative Childcare arrangements for the event because we have an issue with dc being near the dog and they want the dog there. Except we don't have anyone we can ask, my parents are on holiday at the time and nursery isn't open on a Sunday!!
Obviously I'm never going to compromise the dcs safety but also feel like they're being difficult for the sake of it and thought they'd want the dc to be part of the big event. They pay a dog minder to take the dog for long haul holidays all year round. 5 in the last year in fact, but apparently it's imperative the "fur baby" stays with them this time.
It makes us look even worse because BIL is staying from overseas and is staying at their house with his DS. He hasn't seen the dog around children and is taking MIL's word. I have a funny feeling he'll be requesting to stay with us after a few days.