Make a hooking sentence, that is formal, which is an introduction, introduce a central idea. Like two - one sentences.

On the start of a persuasive writing involving Animal shelters

In the realm of animal welfare, the plight of overcrowded and underfunded animal shelters stands as a pressing issue demanding immediate attention and action.

Be formal, as if you were talking to a president, not wanting to make an embarrassing or childish statement

In the domain of animal welfare, it is imperative to address the critical predicament faced by animal shelters, wherein insufficient funding and overcrowding create a dire urgency for effective intervention and support.