bad blood

The government at home, and the people of the colonies, are getting to have bad blood between them.

Now for these and other things (whereof I could tell a thousand) was the reckoning come that night; and not a line we missed of it; soon as our bad blood was up. I like not to tell of slaughter, though it might be of wolves and tigers; and that was a night of fire and slaughter, and of very long-harboured revenge. Enough that ere the daylight broke upon that wan March morning, the only Doones still left alive were the Counsellor and Carver.

[I]f we dare not search ourselves close enough to discover the low breeding, the bad blood in us, it will one day come out plain as the smitten brand of the forcat.