The response to a sting or bite from insects or bugs is variable and depends on a variety of factors. Most bites and stings result in: 1  pain, 2  swelling, 3  redness, 4  itching, or.  blister.
sparÂ·ing. adj. 1. Given to or marked by prudence and restraint in the use of material resources. 2. Deficient or limited in quantity, fullness, or extent: sparing amounts of criticism. sparâ²ingÂ·ly adv.
(...A dog of any age, really. But you asked if a dog can be too old to be spayed/neutered.) Strictly speaking, you could spay/neuter a dog the day before it dies of old age. The older the dog, the fewer the benefits of spaying/neutering, though. (That said, there are risks to spaying/neutering too young, as well.).