I hate it when he does that

[Charlie Brown accidentally cuts his finger on a can opener while trying to open a can of dog food for Snoopy. Charlie Brown then takes it out to Snoopy's doghouse] Charlie Brown:
[to Snoopy, bitter]
All right, it's supper time. Come and get your supper. [Snoopy notices his chow, while Charlie Brown holds up a bandaged thumb, which he had accidentally cut] Charlie Brown:
Do you see this finger? I cut it opening a can of stupid dog food for your stupid supper. I hope you appreciate it. Besides that, it wasn't a finger; it was my THUMB! [Charlie Brown then points down to order his dog off the roof of his dog house; Snoopy gets down] Charlie Brown:
You've been acting awfully independent lately. [Snoopy ignores him] Charlie Brown:
Don't forget that I'm the one who feeds you. I'm the one who takes care of you. [Snoopy still ignores him] Charlie Brown:
Look at me when I'm talking to you! [Snoopy looks at him] Charlie Brown:
Without me, you'd be nothing! Everything you have, you have because of me. Even that collar around your neck. Why, I remember the day I went out and bought that collar with money I have worked for and have saved and... [Snoopy removes his collar; Charlie Brown walks off in a huff] Charlie Brown:
I hate it when he does that