Hi! I was given 3 ducklings as a surprise for my birthday 2 weeks ago, 2 girls and a boy, aged 2 weeks and the boy was a little bit younger. They've all been going great although the boy is quite a bit smaller but eating and drinking well but today I've noticed a lump just above his beak on the left side! He seems fine although he has had a bit of diarrhoea and he's eating and drinking. Can anyone give any advice on it? They've all bonded beautifully and panic if they slightly get separated.