Around 4 months of age, your Lab puppy will begin replacing the milk teeth with adult teeth. At 6 to 7 months, the full set of 42 permanent teeth will be in.
(plural strike rates) ( 1 baseball) the number of runs of a batter divided by the number of balls faced. ( 2 cricket) the number of runs scored by a batsman per 100 balls faced; the number of balls bowled by a bowler divided by the number of wickets taken.  Link/Cite.
strike - produce by ignition or a blow; strike fire from the flintstone; strike a match strike - cause to form (an electric arc) between electrodes of an arc lamp; strike an arc create, make - make or cause to be or to become; make a mess in one's office; create a furor