The eggs are translucent, smooth and can be seen with the naked eye. The eggs are usually laid on the host and will fall off in various areas as the pet travels. The eggs hatch in 1 to 12 days. The fleas has several cycles beginning with the egg, then the larvae, the pupa and finally the adult. They will remain in a larvae stage for 7 to 15 days and then begin the pupa cycle to make a cocoon, spun from its own saliva, then it emerges as an adult.
Fleas also can transmit a number of diseases.
Mice House mice at approximately 25 days old can carry for 18 to 21 days. The average litter is about 6. The female can have another litter in approximately 50 days. After about 3 weeks the young mouse can eat solid food. Mice generally survive for approximately one year.