The animals of cat family (like tigers) are mainly solitary animals. Frequent quarrelling, biting on ear etc. are required for the normal ovulation of females
Sexual intercourse among animals is intended not for pleasure but for pro-creation and therefore, the issue of "rape"doe not arise in animals. May be among higher primates? I am not sure and will check
Perhaps, a vet can explain this better. It may happen. I watched a national geographic series where lion was trying to mate a lioness but the lioness refused; however, the lion had to force the lioness and this resulted in a brawl. If we go by the series, then evidently, there is rape in the animal kingdom.
I am in agreement with your first stanza but second part is unacceptable.
Coming to question first it is submitted that animals do mate only under the influence of enhance hormone levels when females of a particular species is in heat (as commonly used veterinary vocabulary) whereas it is not so in human beings .They continue to mate all year around.
You will never see animals chasing their females which are not in a heat cycle.
So I donot opine to term like rape in animal kingdom.
Of course law of nature says survival of the fittest.
There are deadly fights among all male animals during heat period of females to go for mating.
Human beings are kind of civilized system where marriage or live in relationship exists to fulfill body requirements of opponent sexes and it is kind of acceptable system in our social culture.
Off course bad elements in human beings doing such sins are much worse than anything bad.
In this context animals may be bit superior but other wise God has graced human beings best of all mammals.
1. Rape is just a legal term, otherwise the same act is done in all creatures (intercourse between two genders) in human society it is bound with legal system of agreement between the two.
2. If the animals disagree for intercourse or, they are not ready, they usually do not let it happen.
3. if we talk about complaining about the painful consequences, then animals also have that panic expression and they also react to that e.g cats, bitches, monkies etc.
There are many examples of animal rape as reported by many observers. We can simply see this in real life among dog species. In breeding center, where a big bull is used by the owner for business rent to fertilize the cows brought by many people from different places. If you see this, you will be sure call this rape and business. Because, the cow is forced to accept this painful sexual intercourse against her will and helped by the master of the bull and owner of cow.
If you see this, you will surely call this rape---------------------------
Over and above this, humans have been using sex as business, either by selling sex service or by women/girl trafficking etc. Humans are solely responsible for spoiling Mother Nature.