i have a 10 week old speckled sussex who is very lethargic and doesn't have much of an appetite... at the base of her neck, she has a large, soft bump... it's not hot to the touch and doesn't seem to be tender, but it's not normal. she's not been herself for a couple of days, and when i looked at her, she just didn't look to be the right shape. when i looked her all over tonight is when i felt this bump. i assume it's her crop, but when the girls have just eaten, that's more to the side of their neck and harder. this is right in the middle at the base of her neck and it's... squishy... does anyone have any ideas?