DogFinderCons.cls

public class DogFinderCons {
    //Apex properties or variables

    public Id owner {get; set;}
    public Id Id { get; set; }
    public Account acc { get; set; }

    //constructor to get the Account record
    public DogFinderCons(ApexPages.StandardController controller) {
    acc =  (Account) controller.getRecord();
    Id = acc.Id;
    System.debug('The account record: ' + acc);
    owner = acc.OwnerId;
    }

    //Method that is called from the Visual Force page action attribute
    public PageReference findaDog() {
        
        
       System.debug('Account Owner: ' + owner);
        System.debug('Account Id: ' + Id);
        //build your code logic here
       			        Http http = new Http();
						HttpRequest request = new HttpRequest();
						request.setEndpoint('https://dog.ceo/api/breeds/image/random');
						request.setMethod('GET');
						String strResp = '';
						String petName = '';
						HttpResponse response = http.send(request);
						// If the request is successful, parse the JSON response.
						if (response.getStatusCode() == 200) {
    					// Deserialize the JSON string into collections of primitive data types.
    					Map<String, Object> results = (Map<String, Object>) JSON.deserializeUntyped(response.getBody());
    					// Cast the values in the 'animals' key as a list
    					System.debug('Received the following animals:' + results);
    					strResp = string.valueof(results.get('message'));
    					System.debug('strResp >>>>' + strResp);
    					petName = strResp.substringBetween('/breeds/','/');
    					System.debug('My new pet is called ' + petName);
							}
							Pet__c newPet = new Pet__c(Name = 'Our new '+ petName, Household__c = Id, Image_URL__c = strResp);
							Insert newPet;
      
        
       PageReference pageRef = new PageReference('/'+Id);
        pageRef.setRedirect(true);
       return pageRef; //Returns to the account page
    }
}