Current Affairs
Dogs’ immune systems change as they age, reveals Mars Petcare UK
![Mars Petcare](https://www.petgazette.biz/wp-content/uploads/2017/11/Picture2-e1509980811165-780x470.png)
Dogsโ immune systems change as they age, meaning they will have a reduced ability to respond to infections or stress, says a new study from Mars Petcare UK.
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