Hello, We are hoping to collect our new furry friend in Sept, & she'll be 4yrs 7mths. She's not neutered & has has 3/4 litters of puppies. Should we get her neutered or not please ? We'll not be having any puppies she'll be our family pet but I was concerned about her age ? She's also a small breed & so again I was concerned about anesthetic / surgery & she's a nervous little thing so I didn't want to put her under unnecessary stress. Thank you