Gather together all the articles and advertising you have to answer this question.
If you still need more information, check ABI/Inform and Business Insights: Global for articles.
Search by company name, or brand name and marketing or pricing.
Whiskas AND marketing
Whiskas AND pricing
Whiskas AND coupons
This is all based on discussions and conclusions the team makes about the material found already.
To find the Ad agency, use the Advertising Redbooks in Hayden Library Reference section:
Do check Ad Age for any recent changes in agency of record.
This is all based on the coupons and discounts you found earlier. Unless there is a very recent article, the databases are not very helpful for this section.
Search by company name, or brand name and advetising technique.
Whiskas AND (coupons OR promotions)
Go to the corporate web site to the news or press release section.
This section otherwise relies on everything you have found about the advertising in early sections of the assignment.