First of all, Hedgehogs DO NOT fall under the family Rodentia. They fall under the family Erinaceidae.
Most people are not allergic to hedgehogs. If you are allergic to hedgehogs, you are likely allergic to their quills and not their fur.
No, people can be allergic to guinea pigs too.
People can be allergic to anything.
Guinea Pigs.
soil
There is a possibility that you may be allergic to rabbits if you are allergic to guinea pigs, as both animals can trigger similar allergic reactions in some individuals. It is recommended to consult with an allergist for proper testing and guidance.
Yes, there is. It is called immunotherapy.First make sure that you are indeed allergic specifically to guinea pigs, then consult your physician and allergist for further steps.
Some guinea pigs are allergic to some foods, however guinea pigs as a species are not particularly allergic to anything.
birds and cats
Guinea pigs don't always make people itch. If they do, then it probably means that you are allergic to the guinea pig, the hay you feed it, or the sheddings in it's cage.
If you are allergic to guinea pigs, you should never ever be near them, because if a sick person is around a guinea pig then that little guinea pig can get very sick.
Sadly, yes. Of course, it depends on whether their allergic to them or not but, it can still affect people with asthma.
Remove the guinea pigs.