 Only females are involved in parenting . Female cougars are fiercely protective of their cubs , and have been seen to successfully fight off animals as large as Grizzly bears in their defense . Litter size is between one and six cubs ; typically two . Caves and other alcoves that offer protection are used as litter dens . Born blind , cubs are completely dependent on their mother at first , and begin to be weaned at around three months of age . As they grow , they begin to go out on forays with their mother , first visiting kill sites , and after six months beginning to hunt small prey on their own . Kitten survival rates are just over one per litter . When cougars are born , they have spots , but they lose them as they grow , and by the age of 2 1 / 2 years , they will completely be gone 
 Only females are involved in parenting . Female cougars <a href='drop_aux' title='1'><mark>are</mark></a>fiercely protective of their cubs , and <a href='been_done' title='2'><mark>have</mark></a> been seen to successfully fight off animals as large as Grizzly bears in their defense . Litter size is between one and six cubs ; typically two . Caves and other alcoves <a href='null_relcl' title='3'><mark>that</mark></a>offer protection are used as litter dens . Born blind , cubs <a href='drop_aux' title='4'><mark>are</mark></a>completely dependent on their mother at first , and begin to be weaned at around three months of age . As they grow , they begin to go out on forays with their mother , first visiting kill sites , and after six months beginning to hunt small prey on their own . Kitten survival rates <a href='drop_aux' title='5'><mark>are</mark></a>just over one per litter . When cougars are born , they <a href='got' title='6'><mark>have</mark></a> spots , but they lose them as they grow , and by the age of 2 1 / 2 years , they will completely be gone 
Only females are involved in parenting . Female cougars fiercely protective of their cubs , and done been seen to successfully fight offf animals as large as Grizzly bears in their defense . Litter size is between one and six cubs ; typically 2 . Caves and other alcoves offer protection r used as litter dens . Born blind , cubs completely dependent on their mother at first , and begin to be weaned at around three months of age . As they grow , they begin to go out on forays wid their mother , first visiting kill sites , and after six months beginning to hunt small prey on their own . Kitten survival rates jus over one per litter . When cougars are born , they got spots , but they lose em as they grow , and by the age of 2 1 / 2 yrs , they will completely b gone