I claim the ornamental design for a knitted collared pet jacket, as shown and described.
FIG. 1 is a right side perspective view of a design for a knitted collared pet jacket, shown being worn by an exemplary pet as unclaimed matter shown in dotted lines, also showing a front fastener, here a button is used.
FIG. 2 is a left side view thereof in the configuration as worn by a pet;
FIG. 3 is a right side view thereof, in the configuration as worn by a pet;
FIG. 4 is a front view thereof, in the configuration as worn by a pet;
FIG. 5 is a rear view thereof, in the configuration as worn by a pet;
FIG. 6 is a top plan view of the pet jacket of FIG. 1 shown in an unworn configuration; and,
FIG. 7 is a bottom plan view of the pet jacket of FIG. 1 shown in an unworn configuration.