My cat had a booster two days ago, would that make him sick?

[annadele]

He is 16 years old, also was given pills for arthritis, two days ago. and his booster,. This morning, he is not eating , he just sleeps and seems like he wants no one near him. He vomitted once, it was like foam. He usually sleeps a lot, but nothing stops him from eating.

[Ghilly]

Any type of immunizations can make a cat of dog feel under the weather.  Even human babies often run fevers as a reaction to their immunization shots.  If the animal still seems to be "off" two or three days later, contact your vet and let him know.  

Recent research has shown that yearly immunizations are not only not necessary, they can actually be harmful to pets.  It's safer, instead of just automatically giving them their yearly shots, to have blood drawn and have titers run to determine the animal's level of immunity before vaccinating.  In many cases, it has been discovered that in healthy animals who received their immunizations at weaning and boosters the following year, a lifelong immunity has resulted, meaning that it was not necessary to vaccinate them again at all.

Vaccination protocols have changed in recent years for another reason.  Besides possibly being unnecessary, it has also been found that there is a high incidence of injection site carcinomas as a result of the adjuvents in the vaccines.  Vaccinations used to be given subcutaneously in the scruff of the neck, or intramuscularly in the hip.  Because of the high incidence of injection site tumors, vaccinations are now given lower down on the leg.  This is so that if an injection site tumor does develop, the leg can be removed, removing the cancer and saving the life of the animal.  If an injection site carcinoma develops on the hip or on the neck, nothing can be done other than excision of the tumor, but in many cases it spreads anyway and the animal ends up dying of cancer.  

I know this is a lot more information than you asked for, but I figured as long as I was responding to a question about vaccinations I might as well pass along the information since, IMO, it's fairly important information.  :)

Ghilly

[Cotten]

I don't know what booster your cat had, but I do know two of my four are allergic to the typical boosters/innoculations we are encoureged to give our animals. There has been a fair bit of controvery over the past few years about the necessity of yearly boosters and what I experienced first hand made me stop giving any of our wards any boosters at all. I once read a sad tale from a guradian whose much loved ward died within 48 hours of receiving a booster and in his words, "Please stop loving your cats to death." Meaning of course he was doing what he believed was the best he could do and ended the life of a three year old healthy cat. The last shot my alpha male got we thought we were going to lose him. For three days he laid semi aware, but could not move he was so weak. We kept him hydrated with an eyedropper and hold him up when he had to throw-up so he didn't choke. Never again will I ever subject any of my cats to this.