CBS is changing its Wednesday and Thursday prime-time lineups, with “Big Brother 10” and “Greatest American Dog” switching time slots starting next week.

Wednesday night’s “Big Brother” live eviction episodes move from 8 p.m. to Thursdays at 8 p.m., effective July 31.

“Greatest American Dog” will switch with “Brother,” moving to the Wednesday 8 p.m. slot from the Thursday night period, effective July 30.