8. "Freeze Tag" Hamster
One thing that hamsters are absolute experts at is freezing. This involves your hamster staying in one position for a few minutes, its ears straight up and completely stiff to the touch. When a hamster takes part in “freeze tag,” it’s interested in something and has given its full attention to investigating it.
9. "Spa Day" Hamster
A hamster that spends time grooming itself thoroughly is at peace. The hamster feels calm, at ease and is in its element. Just as a human being doesn’t want to be interrupted in the middle of a massage, your hamster doesn’t want to be bothered while in the midst of a grooming session.
If you take notice of your hamster grooming suddenly, without prior indication of doing so, something may be amiss. A hamster that begins extensive grooming quite suddenly might be displaying fear. But fear isn’t the only possibility.
“Hamsters normally groom themselves, but excessive grooming may indicate skin problems like parasites, or unclean fur, as occurs with diarrhea,” Johnson said. “A veterinarian should be consulted immediately.”
10. "Sniff, Sniff" Hamster
Hamsters engage in two different types of sniffing: a big, loud, deep sniff; and sniffing that is continuous. The continuous sniffing is a sign that a hamster is learning more about its current environment and is curious about its surroundings. This behavior most often takes place during exploration.
The big, loud, deep sniff is quite similar to continuous sniffing, but has one major difference: it takes place when a hamster investigates a new location or place. This does not mean that a hamster will do a big, loud, deep sniff whenever it investigates its cage — quite the opposite. A hamster is most likely to engage in big, loud, deep sniffs during exploration, when it encounters something unfamiliar, such as a tight passageway it cannot squeeze through. This sniff is a hamster’s way of learning more about this foreign place, even though it can’t physically explore it.
11. "The Grind" Hamster
“When a hamster grinds his teeth, it is very possible that this means that he is hungry and searching for food,” Kraemer said. “From a medical perspective, if teeth grinding — bruxism — is accompanied by drooling and a decrease in appetite or anorexia, this could be an indication of pain. One can carefully inspect a hamster’s incisors by scruffing the skin on the back of its neck to expose the incisors and check for damage, overgrowth or incomplete wear.”
12. "Nip Knowledge" Hamster
Nipping involves taking the skin of a human being between the teeth, and giving a gentle and quick pinch (generally on the hands). Hamsters, being fickle little creatures, might nip when they want attention, or when they are displaying annoyance. Most often nipping takes place when a hamster is being held and wants to be put down so that it can play and explore. Nips also occur when a hamster that is resting and wants to be left alone gets disturbed. In either case, give the little hamster its way — you can always play with it at a later time.
13. "Lean Back" Hamster
Hamsters are very inquisitive animals. They are full of curiosity and constantly explore their surroundings. To do this, they typically keep their ears perked up and alert. Therefore, when you spot a hamster with its ears laid back against its head, it often means trouble.
14. "Species Behavior Differences" Hamster
Campbell’s, Winter White, Syrian, Roborovski and Chinese hamsters all possess almost identical behavioral characteristics. The two differences are that Chinese hamsters tend to be less easily stressed and Syrian hamsters must live alone once they reach maturity.