During the climax, Nick and Fletcher can be seen using Mac's catapault model to hurl the eggs they'd desired so badly at Mrs. Tweedy, though they do it while crying.
After Mrs Tweedy is defeated, the hugs and kisses the characters share are most definitely this. Rocky hugs Ginger, Mac kisses Fowler, Babs and Bunty hug, Nick and Fetcher hug. Finally, Ginger grabs Rocky. Cue Big Damn Kiss. As the others go: "Awww..."
The ending's imagery is worth noting as a CMOH. After spending the whole film with bleak, grey skies and brown, dirty grounds, the ending's imagery is filled with blue skies and green pastures, truly signifying the chickens' newfound freedom.